David,
Wetting is usually only required with contacts that never see any
significant current (like what you may have in a receiver). If it's being
used in a transmit capacity, you have an automatic rewetting action, if you
will, with every key-down. I think there is a discussion of this on the
PA3AKE site somewhere.
73/jeff/ac0c
www.ac0c.com
--------------------------------------------------
From: "Vic K2VCO" <vic@rakefet.com>
Sent: Sunday, August 08, 2010 1:00 PM
To: <amps@contesting.com>
Subject: Re: [Amps] Automotive Relays
> I have a recurring problem with this with a homemade switchbox (luckily in
> my shack, not
> on a tower). Deoxit does help, but the problem recurs.
>
> It's been suggested that I run a bit of DC through the contacts to
> electrically 'wet'
> them. I bet this would work, but it's slightly complicated and I haven't
> tried it.
>
> On 8/8/2010 3:45 AM, David Cutter wrote:
>> That begs a question I've often puzzled over: how does a contact rated
>> at
>> 10A cope with uV level signals, particularly after the gold flash has
>> gone ?
>>
>> David
>> G3UNA
>>
>>
>>> I did a survey about 15 years ago on CQ-Contest (then the only reflector
>>> available). IIRC, there were essentially no complaints about the
>>> Ameritron RCS-8 or the TopTen remote relay box. I used two TopTens for
>>> maybe 10 years, often operating into>3:1 SWRs at>1200 watts (for
>>> example, running an 80m array cut for CW up in the DX phone window) and
>>> never had any relay problems. Currently using an RCS-10, which can have
>>> up to 7 relays in the RF path. Will be interesting to see how it holds
>>> up.
>>>
>>> Right now my Array Solutions Stackmatch has a bad relay (dirty?).
>>> Symptom is occasional high SWR and a lack of received signal on the
>>> lower antenna in my tribander stack. If I send a little high power RF
>>> through it things are then fine.
>>>
>>> 73, Pete N4ZR
>>>
>> _______________________________________________
>> Amps mailing list
>> Amps@contesting.com
>> http://lists.contesting.com/mailman/listinfo/amps
>
>
> --
> Vic, K2VCO
> Fresno CA
> http://www.qsl.net/k2vco/
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|